Seagate ST3146807FC manual Reliability and service, Mean time between failure Mtbf, Service life

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Cheetah 10K.6 FC Product Manual, Rev. B

Sense Key. This is an unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF calculations. Refer to the Fibre Channel Interface Manual, part number 77767496, for Request Sense informa- tion.

5.2Reliability and service

You can enhance the reliability of Cheetah 10K.6 FC disc drives by ensuring that the drive receives adequate cooling. Section 6.0 provides recommended air-flow information, temperature measurements, and other infor- mation, which you can use to enhance the service life of the drive.

5.2.1Mean time between failure (MTBF)

The production disc drive achieves an MTBF of 1,200,000 hours when operated in an environment that ensures the case temperatures specified in Section 6.3.1 are not exceeded. Short-term excursions up to the specification limits of the operating environment will not affect MTBF performance. Operating the drive at case temperatures above these values will adversely affect the drive’s ability to meet specifications. See Section Fig- ure 12., "Environmental limits".

The MTBF target is specified as device power-on hours (POH) for all drives in service per failure.

The following expression defines MTBF:

MTBF per measurement period = Estimated power-on operating hours in the period

Number of drive failures in the period

Estimated power-on operating hours means power-on hours per disc drive times the total number of disc drives in service. Each disc drive must have accumulated at least nine months of operation. Data is calculated on a rolling average base for a minimum period of six months.

MTBF is based on the following assumptions:

•8,760 power-on hours per year

•250 average on/off cycles per year

•Operating at nominal voltages

•System provides adequate cooling to ensure the case temperatures specified in Section 6.3.1 are not exceeded.

Drive failure means any stoppage or failure to meet defined specifications caused by drive malfunction.

A S.M.A.R.T. predictive failure indicates that the drive is deteriorating to an imminent failure and is considered an MTBF hit.

5.2.2Preventive maintenance

No routine scheduled preventive maintenance is required.

5.2.3Service life

The drive has a useful service life of five 5 years. Depot repair or replacement of major parts is permitted dur- ing the lifetime.

5.2.4Service philosophy

Special equipment is required to repair the drive HDA. To achieve the above service life, repairs must be per- formed only at a properly equipped and staffed Seagate service and repair facility. Troubleshooting and repair of PCBs in the field is not recommended because of the extensive diagnostic equipment required for effective servicing. There are not spare parts available for this drive. The drive warranty is voided if the HDA is opened.

5.2.5Service tools

No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.4. The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not practical because users cannot purchase individual parts for the drive.

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Contents Page Page Page Page Revision status summary sheet Revision Date Writer/Engineer Sheets AffectedPage Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Cheetah 10K.6 FC Product Manual, Rev. B ViiPage Scope Cheetah 10K.6 FC family disc driveCheetah 10K.6 FC Product Manual, Rev. B Applicable standards and reference documentation Australian C-Tick Korean MICTaiwanese Bsmi Reference documentsGeneral description Cheetah 10K.6 FC disc driveStandard features Media descriptionPerformance ReliabilityFactory-installed accessories Factory-installed optionsUser-installed accessories Unformatted and formatted capacitiesCheetah 10K.6 FC Product Manual, Rev. B Performance characteristics Internal drive characteristicsSeek performance characteristics Access time Format command execution time in minutesGeneral performance characteristics Start/stop timePrefetch/multi-segmented cache control Cache operationCaching write data Prefetch operation Reliability specifications Reliability and service Preventive maintenanceService life Service philosophy7 S.M.A.R.T Controlling S.M.A.R.TPerformance impact Milliseconds Reporting controlDetermining rate Predictive failuresState of the drive prior to testing ImplementationInvoking DST Short and extended testsProduct warranty Log page entriesAbort ShippingPhysical/electrical specifications AC power requirementsDC power requirements General DC power requirement notesPower sequencing Conducted noise immunityCurrent profiles +5V +12VTypical ST373307FC drive +12V current profile Typical ST3146807FC drive +5V current profile Typical ST373307FC drive +5V current profile Power dissipation ST3146807FC ST373307FCTemperature Cheetah 10K.6 FC Product Manual, Rev. B ST336607FCRelative humidity Effective altitude sea levelShock and vibration ShockPackage size Packaged/product weight Drop height Recommended mounting Air cleanliness Cheetah 10K.6 FC Product Manual, Rev. B VibrationAcoustics Mechanical specifications Mounting configuration dimensionsDefect and error management Drive internal defects/errorsDrive error recovery procedures Read retry Maximum recovery time per Write retry FC-AL system errorsRead and write retry count maximum recovery times Maximum recovery time perInstallation Drive ID/option selectionLED connections 1 J6 connector requirements Drive FrontDrive orientation CoolingDrive mounting Air flowGrounding FC-AL features Fibre Channel link service framesInterface requirements Fibre Channel task management functionsFibre Channel port login NPort login Plogi payload BytesFibre Channel Process Login Fibre Channel Process Login AcceptNPort Login Accept ACC payload Bytes Process Login Plri payloadFibre Channel fabric login Fabric Login Flogi payload BytesFabric Login Accept ACC payload Bytes Accept or NPort Login when sending frames to an initiatorFibre Channel Arbitrated Loop options Dual port supportFC-AL options supported Option SupportedSupported commands Command code Command name Supported commands Command code Supported Command nameRead descriptor mode Cheetah 10K.6 FC Product Manual, Rev. B Mode Sense data Cheetah 10K.6 FC Product Manual, Rev. B Inquiry dataCheetah 10K.6 FC inquiry data Bytes Data hexCheetah 10K.6 FC Product Manual, Rev. B DEF DEF CHG Cheetah 10K.6 FC Product Manual, Rev. B Miscellaneous operating features and conditions Miscellaneous featuresSupported Feature or condition Miscellaneous statusPhysical characteristics Physical descriptionConnector requirements Part description Positions Part number FeaturesPin Signal name Signal type Pin descriptionsFC-SCA pin descriptions Power Fault LED OutFC-AL transmitters and receivers Active LED OutEnable port bypass signals Motor start controls11 SEL6 through SEL0 ID lines Parallel Enclosure Services Interface ESI Setting Setting Hex DecArbitrated loop physical address Alpa values Signal characteristics TTL input characteristicsLED driver signals Device control codesTransmit eye diagram Differential Pecl inputEye diagram data values Link rate GHzSeagate Technology support services Online Services Automated ServicesPresales Support Technical SupportCustomer Service CSO USA/Canada/Latin America Support ServicesEuropean Support Services Africa/Middle East Support Services Asia/Pacific Support ServicesCall Center Toll-free Direct dial Cheetah 10K.6 FC Product Manual, Rev. B Index FC-AL Cheetah 10K.6 FC Product Manual, Rev. B Plogi Cheetah 10K.6 FC Product Manual, Rev. B Cheetah 10K.6 FC Product Manual, Rev. B
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ST336607FC, ST373307FC, ST3146807FC specifications

The Seagate ST373307FC, ST3146807FC, and ST336607FC are robust hard disk drives designed for enterprise environments where reliability and performance are critical. Each model offers distinct features suited to various data storage needs, reflecting Seagate's commitment to innovation in storage technology.

The ST373307FC is a 73GB Fibre Channel hard drive that operates at 15,000 RPM, making it exceptionally fast for read and write operations. This drive employs a 4GB cache, enhancing its performance by allowing quicker access to frequently used data. With a 3.5-inch form factor, the ST373307FC is built for high-density environments, delivering reliable access to data. Its Fibre Channel interface supports high-speed connections, essential for data-intensive applications like databases and virtualization.

Next in line, the ST3146807FC offers a capacity of 146GB, also operating at 15,000 RPM. This drive features an 8GB cache, which significantly improves its data transfer rates, making it ideal for transactional workloads. The ST3146807FC is engineered to minimize latency and maximize throughput, ensuring that enterprises can access critical data swiftly and efficiently. Additionally, its rugged construction is designed to withstand the demands of continuous operation, providing peace of mind for businesses with strict uptime requirements.

Lastly, the ST336607FC has a substantial storage capacity of 300GB and shares the 15,000 RPM operational speed that characterizes this high-performance line. With a similar 8GB cache as the ST3146807FC, it offers excellent performance for read-intensive and write-heavy applications. The ST336607FC is also designed with enhanced thermal management features, supporting cooler operations in densely packed server environments. This model is particularly suited for applications such as data warehousing and online transaction processing, where speed and reliability are paramount.

Each of these drives utilizes advanced technologies like Native Command Queuing (NCQ), which optimizes the order of read and write requests. These features, combined with Seagate's reputation for durability and performance, make the ST373307FC, ST3146807FC, and ST336607FC excellent choices for enterprise applications requiring high-speed data access and exceptional reliability. In environments where data integrity and uptime are critical, these drives provide the robust performance necessary to meet demanding storage needs.
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